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Date: Mon, 4 Dec 2006 15:53:04 +0100
From: Martin Schwidefsky <schwidefsky@...ibm.com>
To: linux-kernel@...r.kernel.org, heiko.carstens@...ibm.com
Subject: [S390] extmem unbalanced spin_lock.
From: Heiko Carstens <heiko.carstens@...ibm.com>
[S390] extmem unbalanced spin_lock.
segment save will exit with a lock held if the passed segment doesn't
exist. Any subsequent call to segment_save will lead to a deadlock.
Fix this and give up the lock before returning.
Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
---
arch/s390/mm/extmem.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff -urpN linux-2.6/arch/s390/mm/extmem.c linux-2.6-patched/arch/s390/mm/extmem.c
--- linux-2.6/arch/s390/mm/extmem.c 2006-11-29 22:57:37.000000000 +0100
+++ linux-2.6-patched/arch/s390/mm/extmem.c 2006-12-04 14:50:45.000000000 +0100
@@ -563,8 +563,9 @@ segment_save(char *name)
seg = segment_by_name (name);
if (seg == NULL) {
- PRINT_ERR ("could not find segment %s in segment_save, please report to linux390@...ibm.com\n",name);
- return;
+ PRINT_ERR("could not find segment %s in segment_save, please "
+ "report to linux390@...ibm.com\n", name);
+ goto out;
}
startpfn = seg->start_addr >> PAGE_SHIFT;
-
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